commit a93e20a83077f57638f8574b1c072ce6712e95ec
author Dan Carpenter <error27@gmail.com> Sat Mar 19 08:45:43 2011 +0300
committer Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Thu Mar 24 10:32:45 2011 -0400
tree 1cb7c814949381ae44638ca9bd62c81432c94abf
parent 12f0258d5b44b3b5a9442ec461bbac1f7edab8c6

xen-gntdev: unlock on error path in gntdev_mmap()

We should unlock here and also decrement the number of &map->users.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

drivers/xen/gntdev.c

diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c
index 00b3acc..b0f9e8f 100644
--- a/drivers/xen/gntdev.c
+++ b/drivers/xen/gntdev.c
@@ -662,7 +662,7 @@
 	if (map->flags) {
 		if ((vma->vm_flags & VM_WRITE) &&
 				(map->flags & GNTMAP_readonly))
-			return -EINVAL;
+			goto out_unlock_put;
 	} else {
 		map->flags = GNTMAP_host_map;
 		if (!(vma->vm_flags & VM_WRITE))
@@ -700,6 +700,8 @@
 	spin_unlock(&priv->lock);
 	return err;
 
+out_unlock_put:
+	spin_unlock(&priv->lock);
 out_put_map:
 	if (use_ptemod)
 		map->vma = NULL;